In a 3-quart saucepan, combine sugar and corn syrup. Cook over medium heat, stirring constantly, until sugar dissolves and mixture comes to a boil. Remove from heat. Stir in peanut butter until mixture is smooth and thoroughly combined.Advertisement
Before opening bag of corn chips, lightly crush chips in the bag with your hands. Add corn chips to peanut butter mixture and stir until well-coated, continuing to break up corn chips as you stir. Transfer mixture to a well-greased 8x8x2-inch baking pan. Spread evenly. Top with a piece of wax paper and press to make a firm, even layer. Set aside.
Combine chocolate and butterscotch chips in a small microwave-safe bowl. Microwave for 30 seconds; stir. Repeat. Continue cooking in 10-second intervals until mixture is melted and smooth. Pour over corn chip mixture in pan and spread evenly. Let stand until firm. Cut into 4x1-inch bars. (Trust us, you don't need a bigger bar; the corn chips make these richer than a traditional scotcheroo.)